When rounding to a specific place, take a look at the digit immediately to the right of the target, in this case, the seventh decimal place. If that digit is 4 or less, zero everything to the right of the target out. If that digit is 5 through 9, increase the target by one and zero everything to the right of it out. If the target is a 9, increasing it will turn it to zero and increase the digit to the left of the target by one.
Yes
how many decimals in hundredths round to 0.5
round 1.998 to the four decimals as needed = 1.9980
7 If you mean integers, 7. If you mean decimals: An infinite number of decimals are between 6 and 8. 6.1, 6.2, 6.3 and so on. Then you can get decimals like 6.111112222222 I assume you mean integers so 7.
4.0
Yes
how many decimals in hundredths round to 0.5
round 1.998 to the four decimals as needed = 1.9980
7 If you mean integers, 7. If you mean decimals: An infinite number of decimals are between 6 and 8. 6.1, 6.2, 6.3 and so on. Then you can get decimals like 6.111112222222 I assume you mean integers so 7.
You round .4 .3 .2 and .1 down and .5 .6 .7 .8 and .9 up.
4.0
The decimals of: 34.5, 34.6, 34.7, 34.8 and 34.9 all round up to 35
12
your dumb if you don't know how to round decimals on a number line
65.326
400
840.01